Brake Assembly with Anchor Pin Retention

ABSTRACT

A brake assembly having a brake spider that may receive an anchor pin or a sleeve that receives an anchor pin. Features such as splines may be provided with the anchor pin to help secure the anchor pin to the brake spider or the sleeve. Engagement features may be provided with the sleeve to help secure the sleeve to the brake spider.

TECHNICAL FIELD

This disclosure relates to a brake assembly that has a brake spider thathas a mounting hole that may receive an anchor pin or a sleeve thatreceives an anchor pin.

BACKGROUND

A brake assembly having a brake shoe and an anchor pin is disclosed inU.S. Pat. No. 9,004,224.

SUMMARY

In at least one embodiment, a brake assembly is provided. The brakeassembly may have a brake spider and an anchor pin. The brake spider mayhave a mounting hole. The anchor pin may be disposed in the mountinghole. The anchor pin may extend along an axis and may have a set ofsplines. The splines may engage the brake spider in the mounting holeand may extend substantially parallel to the axis. The splines maydeform the brake spider when the anchor pin is inserted into themounting hole.

In at least one embodiment, a brake assembly is provided. The brakeassembly may include a brake spider, a sleeve, and an anchor pin. Thebrake spider may have a mounting hole. The sleeve may be received in themounting hole and may have a sleeve hole. The anchor pin may be disposedin the sleeve hole and may extend along an axis. The anchor pin may havea set of splines that may engage the sleeve in the sleeve hole and mayextend substantially parallel to the axis. The splines may deform thesleeve when the anchor pin is inserted into the sleeve hole.

In at least one embodiment, a brake assembly is provided. The brakeassembly may include a brake spider, a sleeve, and an anchor pin. Thebrake spider may have a mounting hole. The sleeve may be received in themounting hole and may have a sleeve hole that may extend along an axis.The sleeve may have a set of engagement features that may be disposed inthe sleeve hole and that may extend toward the axis. The anchor pin maybe received in the sleeve hole and may be engaged by the set ofengagement features.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a brake assembly.

FIG. 2 is an exploded view of a portion of the brake assembly showing ananchor pin and a brake spider.

FIG. 3 is a magnified view of a portion of the brake assembly showingthe anchor pin received in the brake spider.

FIG. 4 is an exploded view of a portion of the brake assembly showingthe anchor pin, a sleeve, and the brake spider.

FIG. 5 is a magnified view of a portion of the brake assembly of FIG. 4showing the anchor pin received in the sleeve.

FIG. 6A is an exploded view of a portion of the brake assembly showingan anchor pin and a second sleeve.

FIG. 6B is an end view of the second sleeve of FIG. 6A.

FIG. 6C is a magnified view of a portion of the brake assembly showingthe second sleeve received in the brake spider.

FIG. 7A is a perspective view of a third sleeve that may be providedwith the brake assembly.

FIG. 7B is a section view of the third sleeve along line 7B-7B.

FIG. 8A is a perspective view of a fourth sleeve that may be providedwith the brake assembly.

FIG. 8B is a section view of the third sleeve along line 8B-8B.

DETAILED DESCRIPTION

As required, detailed embodiments of the present invention are disclosedherein; however, it is to be understood that the disclosed embodimentsare merely exemplary of the invention that may be embodied in variousand alternative forms. The figures are not necessarily to scale; somefeatures may be exaggerated or minimized to show details of particularcomponents. Therefore, specific structural and functional detailsdisclosed herein are not to be interpreted as limiting, but merely as arepresentative basis for teaching one skilled in the art to variouslyemploy the present invention.

Referring to FIG. 1, an exemplary brake assembly 10 is shown. The brakeassembly 10 may be provided with a vehicle, such as a motor vehicle likea truck, bus, farm equipment, military transport or weaponry vehicle, orcargo loading equipment for land, air, or marine vessels. In addition,the brake assembly 10 may be provided on a trailer that may be coupledto or provided with a motor vehicle.

The brake assembly 10 may be a friction brake that may be configured toslow or inhibit rotation of at least one associated wheel. In FIG. 1,the brake assembly 10 is depicted as a drum brake. In a drum brakeconfiguration, a brake drum 12 may extend continuously around brake padassemblies that may be actuated to engage the brake drum 12 and slow therotation of a wheel associated with the brake drum 12. The brake drum 12may be disposed between the wheel and a wheel hub assembly or wheel hubassembly that may rotatably support the wheel. The brake drum 12 isoutlined in phantom lines in FIG. 1 to more clearly show othercomponents of the brake assembly 10. In at least one embodiment, thebrake assembly 10 may include a brake spider 20, at least one brake padassembly 22, a camshaft 24, a slack adjuster 26, and an actuator 28, atleast one anchor pin 30, and optionally a sleeve 32, an example of whichis shown in FIG. 4.

Referring to FIGS. 1 and 2, the brake spider 20 is shown in more detail.The brake spider 20 may support various components of the brake assembly10. In addition, the brake spider 20 may facilitate mounting of thebrake assembly 10 to the vehicle. For example, the brake spider 20 maybe fixedly disposed on an axle assembly or steering knuckle or may befixedly disposed with respect to an axle assembly or steering knuckle.In at least one embodiment, the brake spider 20 may be generallyring-shaped and may include an opening 40 through which an axle and/or aspindle may extend. For example, a spindle may extend through theopening 40 and may support one or more wheel bearings that may supportand facilitate rotation of a wheel hub assembly. The brake spider 20 mayalso include at least one spider mounting hole 42, at least one mountinghole 44, a camshaft opening 46, and a pair of opposing side surfaces 48.

A spider mounting hole 42 may facilitate mounting of the brake spider 20to the vehicle. A plurality of spider mounting holes 42 may be arrangedaround the opening 40. The spider mounting hole 42 may receive afastener, such as a bolt, that may extend through the spider mountinghole 42 and couple the brake spider 20 to an axle assembly or steeringknuckle. The spider mounting holes 42 may be through holes that mayextend between the pair of side surfaces 48.

The mounting hole 44 may receive an anchor pin 30 and optionally asleeve that may facilitate mounting of a brake pad assembly 22 to thebrake spider 20 will be discussed in more detail below. In FIG. 1, twomounting holes 44 are provided that are generally located on the brakespider 20 opposite the camshaft opening 46. Each mounting hole 44 mayreceive a different anchor pin 30, which in turn may support a brake padassembly 22. As is best shown in FIG. 2, the mounting hole 44 may be athrough hole that may extend between the pair of side surfaces 48 orfrom one side surface 48 to the opposite side surface 48.

The camshaft opening 46 may receive the camshaft 24. More specifically,the camshaft 24 may extend through the camshaft opening 46 and may beconfigured to actuate a cam roller that may support a correspondingbrake pad assembly 22. The camshaft opening 46 may be a through holethat may extend between the pair of side surfaces 48.

The brake pad assembly 22 may be configured to slow or inhibit therotation of a wheel or wheel end assembly. In FIG. 1, two brake padassemblies 22 are shown. Each brake pad assembly 22 may include a brakeshoe 50 and friction material 52.

The brake shoe 50 may be a structural member of a brake pad assembly 22and may facilitate mounting of the brake pad assembly 22 to the brakespider 20. The brake shoe 50 may include a table 60 and one or more webs62.

The table 60 may be configured to support the friction material 52. Thetable 60 may be curved or extend along an arc that may have asubstantially constant radius.

One or more webs 62 may extend from the table 60. In FIG. 1, two webs 62are shown that extend from the table 60 and are disposed on oppositesides of the brake spider 20. The webs 62 may have the same or similarconfigurations. The webs 62 may be mounted to the table 60 in anysuitable manner, such as by welding or with one or more fasteners. Eachweb 62 may have a first end that may be disposed proximate the anchorpin 30 and a second end that may be disposed proximate the camshaft 24.For instance, each web 62 may have an anchor pin slot 70 that mayreceive the anchor pin 30. The anchor pin slot 70 may have any suitableconfiguration. For instance, the anchor pin slot 70 may be an open endedslot that may extend from the first end of the web 62 or may be athrough hole that may be spaced apart from the first end of the web andmay be completely defined within the web 62. In FIG. 1, the anchor pinslot 70 is configured as a generally semispherical open-ended slot thatextends from the first end of each web 62.

The friction material 52, which may also be called a brake lining, maybe disposed on the brake shoe 50. More specifically, the frictionmaterial 52 may be fixedly disposed on the table 60 and may face towardthe brake drum 12. The friction material 52 may engage the brake drum 12during vehicle braking and may be spaced apart from the brake drum 12when the friction braking is not being applied.

The camshaft 24 may be configured to actuate the brake pad assemblies22. The camshaft 24 may extend along and may rotate about a camshaftaxis 80. In addition, the camshaft 24 may extend through the camshaftopening 46 in the brake spider 20. The camshaft 24 may include a camdisposed at a first end. The cam may be an S-cam and may be configuredto engage and support one or more cam rollers that may be disposedbetween the brake shoe 50 and the cam. Rotation of the camshaft 24 aboutthe camshaft axis 80 in a first direction may actuate cam rollers andthe brake pad assemblies 22 such that the friction material 52 movestoward or engages an inner surface of the brake drum 12 to brake or slowor inhibit rotation of an associated wheel or wheel end assembly.

The slack adjuster 26 may be provided to compensate for brake wear orwear of the friction material 52. The slack adjuster 26 may operativelyconnect the actuator 28 to the camshaft 24. For instance, the slackadjuster 26 may be disposed near the second end of the camshaft 24. Theslack adjuster 26 may be coupled to the camshaft 24 in any suitablemanner. As an example, a mounting hole of the slack adjuster 26 and thecamshaft 24 may have mating splines that may help couple the slackadjuster 26 to the camshaft 24.

The actuator 28 may be provided to actuate the camshaft 24 and the brakepad assemblies 22. The actuator 28 may be of any suitable type, such asa pneumatic, hydraulic, electrical, or electromechanical actuator. Theactuator 28 may move between a retracted position and an extendedposition. In the retracted position, the camshaft 24 may be positionedsuch that a brake pad assembly 22 does not engage the brake drum 12 tobrake or inhibit rotation of an associated wheel. In the extendedposition, the camshaft 24 may rotate about the camshaft axis 80 and maybe positioned such that a brake pad assembly 22 moves toward and engagesthe brake drum 12 to inhibit rotation of an associated wheel hubassembly.

Referring to FIGS. 1 and 2, the anchor pin 30 may support and facilitatemounting of a brake pad assembly 22 to the brake spider 20. The anchorpin 30 may be a separate component from the brake spider 20 and may befixedly received in the mounting hole 44 such that the anchor pin 30does not rotate or move with respect to the brake spider 20. Thus,movement of the anchor pin 30 with respect to the brake spider 20 may beinhibited or eliminated, which in turn may inhibit or eliminateundesirable noise that can occur when the anchor pin 30 moves withrespect to the brake spider 20. In FIGS. 1 and 2, the anchor pin 30engages the brake spider 20 in the mounting hole 44. Alternatively, theanchor pin 30 may be received in and may engage a sleeve 32 as shown inFIG. 4, which in turn may be fixedly received in the mounting hole 44 ofthe brake spider 20 as will be discussed in more detail below.

The anchor pin 30 may be made of any suitable material. For instance,the anchor pin 30 may be made of a material like stainless steel thatmay resist corrosion that may otherwise bond the anchor pin 30 to thebrake spider 20 or the sleeve 32 (if provided). As such, the anchor pin30 may be made of a different material than the brake spider 20 and thesleeve 32 in one or more embodiments. In addition, the anchor pin 30 mayhave a greater hardness than the brake spider 20 or a region of thebrake spider 20 that defines the mounting hole 44. The anchor pin 30 mayextend along an axis 90 and may have a pair of end portions 92 and abody portion 94.

The end portions 92 may extend from opposite ends of the body portion94. The end portions 92 may be centered with respect to the axis 90 andmay be substantially cylindrical in one or more embodiments. Each endportion 92 may be received in a corresponding anchor pin slot 70 in aweb 62. In addition, each end portion 92 may extend outwardly from of amounting hole 44 of the brake spider 20 or may be disposed outside ofthe mounting hole 44 of the brake spider 20 and outside of the sleeve32, if provided.

The body portion 94 may be received in the mounting hole 44 and mayengage the brake spider 20. The body portion 94 may extend further fromthe axis 90 than the end portions 92 and may have a larger diameter thanan end portion 92. In addition, the body portion 94 may be providedwithout holes or recesses that may receive a separate fastener, such asa pin or bolt, that may otherwise be provided to couple an anchor pin tothe brake spider 20.

The body portion 94 may be provided in various configurations. In FIGS.2-5, the body portion 94 has a set of splines 100. The splines 100 maybe arranged around the axis 90. In at least one embodiment, the splines100 may extend substantially parallel to the axis 90 and may extendcontinuously across the body portion 94.

The splines 100 may have a greater hardness than the brake spider 20. Assuch, the splines 100 may deform the brake spider 20 when the anchor pin30 is inserted into the mounting hole 44. This is best illustrated bycomparing FIG. 2 and FIG. 3. In FIG. 2, the mounting hole 44 of thebrake spider 20 is shown with a substantially circular shape beforereceiving the anchor pin 30. In FIG. 3, a magnified view is shownillustrating deformation of the mounting hole 44 by the splines 100 ofthe anchor pin 30. The splines 100 may be sufficiently large or extendsufficiently far from the axis 90 to deform the brake spider 20 andaccommodate design tolerances associated with the hole that receives theanchor pin 30 (e.g., each spline 100 may engage the component in whichit is received). In addition, the splines 100 may help reduce stress onthe brake spider 20 as compared to an anchor pin that engages and ispressed directly into a mounting hole in the brake spider 20.

Referring to FIG. 3, each spline 100 may have a peak 110 and a pair oftroughs 112. More specifically, each spline 100 may extend from onetrough 112 to an adjacent trough 112 and may include one peak 110.

The peak 110 may be a point or region of the spline 100 that is locatedfurthest from the axis 90. As such, the peak 110 may be disposed at thegreatest radial distance from the axis 90 or may be disposed furthestfrom the axis 90 in a radial direction. The peak 110 of each spline 100or area immediately adjacent to the peak 110 may deform the brake spider20 and/or remove material from the brake spider 20 to form a groove 114in the brake spider 20 when the anchor pin 30 is inserted into themounting hole 44. The groove 114 may extend axially or substantiallyparallel to the axis 90.

The trough 112 may be a point or region of the spline 100 that islocated closest to the axis 90. Each trough 112 may be located where twoadjacent splines 100 meet.

As is best shown in FIG. 3, a gap 116 may be provided between adjacentsplines 100. The gap 116 may be located between the brake spider 20 andthe trough 112 when the anchor pin 30 is received in the mounting hole44. As such, one or more troughs 112 may be spaced apart from and maynot engage the brake spider 20 in one or more embodiments.

Referring to FIGS. 4 and 5, another configuration is shown in which theanchor pin 30 is received in a sleeve 32. More specifically, the anchorpin 30 may be received in the sleeve 32 such that the anchor pin 30 isfixedly positioned with respect to the sleeve 32, thereby inhibiting oreliminating movement of the anchor pin 30 with respect to the sleeve 32that may otherwise cause undesirable noise. The sleeve 32 may be fixedlyattached to the brake spider 20. For example, the sleeve 32 may be pressfit into the mounting hole 44 such that the sleeve 32 may not move withrespect to the brake spider 20. The sleeve 32 may be a separatecomponent from the brake spider 20 and the anchor pin 30. In addition,the sleeve 32 may extend around the anchor pin 30 such that the anchorpin 30 does not engage the brake spider 20. As such, the sleeve 32 mayengage the brake spider 20 when the anchor pin 30 may engage the sleeve32. In at least one embodiment, the sleeve 32 may extend along the axis90 and may have a flange 120, a body 122, and a sleeve hole 124.

The flange 120 may be disposed at a first end of the sleeve 32. Theflange 120 may extend away from the axis 90. For instance, the flange120 may extend substantially perpendicular to the axis 90 and may beconfigured as a ring that may extend continuously around the axis 90 inone or more embodiments. The flange 120 may engage a side surface 48 ofthe brake spider 20 to inhibit axial movement of the sleeve 32 ormovement along the axis 90 in at least one direction. It is alsocontemplated that the flange 120 may be omitted in one or moreembodiments.

The body 122 may extend along the axis 90. For example, the body 122 mayextend from the flange 120 to a second end of the sleeve 32 that may bedisposed opposite the first end. The body 122 may engage the brakespider 20 in the mounting hole 44.

The sleeve hole 124 may extend along and may be radially disposed aboutthe axis 90. The flange 120 and the body 122 may cooperate to define thesleeve hole 124. The anchor pin 30 may be disposed in the sleeve hole124 such that the anchor pin 30 and the sleeve 32 may be substantiallycoaxially disposed along the axis 90.

The anchor pin 30 may be made of a different material than the sleeve 32and/or may have a greater hardness than the sleeve 32 or a region of thesleeve 32 that defines the sleeve hole 124. For example, the splines 100may have a greater hardness than the sleeve 32. As such, the splines 100may deform the sleeve 32 when the anchor pin 30 is inserted into thesleeve hole 124 as is best illustrated by comparing FIG. 4 and FIG. 5.In FIG. 4, the sleeve hole 124 of the sleeve 32 is shown as beingsubstantially circular before receiving the anchor pin 30. In FIG. 5,the sleeve hole 124 is deformed by the splines 100 of the anchor pin 30.The peak 110 of each spline 100 or region adjacent to the peak 110 maydeform the sleeve 32 and/or remove material from the brake spider 20 toform a groove 114′ in the sleeve 32 when the anchor pin 30 is insertedinto the sleeve hole 124. A gap 116′ may be located between adjacentsplines 100 and between the sleeve 32 and the trough 112 when the anchorpin 30 is received in the sleeve hole 124. As such, one or more troughs112 may be spaced apart from and may not engage the sleeve 32 in one ormore embodiments.

Referring to FIGS. 6A-6C, another configuration is shown in which theanchor pin 30′ is received in a sleeve 32′. As before, the anchor pin30′ may be received in the sleeve 32′ such that the anchor pin 30′ isfixedly positioned with respect to the sleeve 32′, thereby inhibiting oreliminating movement of the anchor pin 30′ with respect to the sleeve32′ that may otherwise cause undesirable noise.

The anchor pin 30′ may have substantially cylindrical body portion 94′that may not include splines. As such, the body portion 94′ may have anouter surface that may be radially disposed with respect to the axis 90.As before, the body portion 94′ may be provided without holes orrecesses that may receive a separate fastener, such as a pin or bolt,that may otherwise be provided to couple the anchor pin to anothercomponent.

The sleeve 32′ may be fixedly attached to the brake spider 20. Forexample, the sleeve 32′ may be press fit into the mounting hole 44 suchthat the sleeve 32′ may not move with respect to the brake spider 20.The sleeve 32′ may be a separate component from the brake spider 20 andthe anchor pin 30′. In addition, the sleeve 32′ may extend around theanchor pin 30′ such that the anchor pin 30′ does not engage the brakespider 20. As such, the sleeve 32′ may engage the brake spider 20 whilethe anchor pin 30′ may engage the sleeve 32′. In at least oneembodiment, the sleeve 32′ may extend along the axis 90 and may have aflange 120, a body 122, a sleeve hole 124, and a set of engagementfeatures 126.

The set of engagement features 126 may be disposed in the sleeve hole124 and may extend toward the axis 90. The anchor pin 30′ may bereceived in the sleeve hole 124 and may be engaged by the set ofengagement features 126. Each member of the set of engagement features126 may be configured as a spline that may extend substantially parallelto the axis 90 from the first end to the second end of the sleeve 32′.The splines may be arranged around the axis 90 in a repeating serpentinearrangement when viewed from the first and/or the second end of thesleeve 32′ or when viewed along the axis 90. The engagement features 126may also form splines that may face away from the axis 90 and may helpfixedly couple the sleeve 32′ to the brake spider 20 in the mountinghole 44. The engagement features 126 or splines may have peaks 110′ andtroughs 112′ that engage the anchor pin 30′ like those previouslydiscussed. The troughs 112′ may engage the outside circumference and maybe deformed or flattened when the sleeve 32′ receives the anchor pin 30′since the anchor pin 30′ may have a greater hardness than the sleeve32′. In addition, the engagement features 126 or splines may haveexternal peaks 110″ and external troughs 112″. The external peaks 110″may deform the brake spider 20 and/or remove material from the brakespider 20 to form a groove 114″ in the brake spider 20 when the sleeve32′ is inserted into the mounting hole 44 of the brake spider 20. Eachexternal trough 112″ may be disposed opposite an external peak 110″. Agap 116″ may be located between the brake spider 20 and the trough 112″when the sleeve 32′ is received in the mounting hole 44.

Referring to FIGS. 7A and 7B, another configuration of a sleeve 32″ isshown. In this embodiment, the engagement features 126″ of the sleeve32″ may be arranged along engagement feature axes 128″. The engagementfeature axes 128″ may be arranged around the axis 90. In addition, theengagement feature axes 128″ may be disposed substantially parallel tothe axis 90. As is best shown in FIG. 7B, the engagement features 126″may be arranged in a repeating serpentine arrangement along eachengagement feature axis 128″. Multiple engagement features 126″ may bearranged along each engagement feature axis 128″ between the flange 120and the second end of the sleeve 32″ that is disposed opposite theflange 120. As is best shown in FIG. 7A, the engagement features 126″may be formed by providing indentations 130″ in the exterior surface ofthe body 122 that extend toward the axis 90. These indentations 130″ maythen form engagement features 126″ that are configured as protrusionsthat extend toward the axis 90. In FIGS. 7A and 7B, the engagementfeatures 126″ are configured as rounded bumps that are spaced apart fromeach other. As is best shown in FIG. 7B, the sleeve 32″ may have asubstantially constant outside diameter D between rows of engagementfeatures 126″ or where indentations 130″ and engagement features 126″are not provided in the body 122.

Referring to FIGS. 8A and 8B, another configuration of a sleeve 32′″ isshown. In this embodiment, each member of the set of engagement features126′″ is configured as an arm 140′″ that is cantilevered from the body122. More specifically, the body 122 may include a plurality of arms140′″ that may be arranged along engagement feature axes 128′″ aspreviously discussed. Each arm 140′″ may be disposed in a correspondingarm opening 142′″. The arm opening 142′″ may extend through the body 122and may extend around the arm 140′″ such that one end of the arm 140′″may extend from the body 122 while the arm 140′″ does not engage thebody 122 in the arm opening 142′″. As such, a free end or distal end144′″ of the arm 140′″ that may be disposed opposite where the arm 140′″extends from the body 122 as well as opposing lateral sides 146′″ of thearm 140′″ that extend from the body 122 to the distal end 144′″ may notengage the body 122. As is best shown in FIG. 8B, the arm 140′″ mayextend from the body 122 to a distal end 144′″ and may be curved towardthe axis 90 between the body 122 and the distal end 144′″ or may beconcave with respect to the exterior surface of the body 122. Inaddition, each arm 140′″ may extend from the body 122 toward the flange120. As such, the distal end 144′″ of each arm 140′″ may be disposedcloser to the flange 120 than the remainder of the arm 140′″, such aswhere the arm 140′″ extends from the body 122.

While exemplary embodiments are described above, it is not intended thatthese embodiments describe all possible forms of the invention. Rather,the words used in the specification are words of description rather thanlimitation, and it is understood that various changes may be madewithout departing from the spirit and scope of the invention.Additionally, the features of various implementing embodiments may becombined to form further embodiments of the invention.

What is claimed is:
 1. A brake assembly comprising: a brake spiderhaving a mounting hole; and an anchor pin that is disposed in themounting hole, wherein the anchor pin extends along an axis and has aset of splines that engage the brake spider in the mounting hole andextend substantially parallel to the axis, wherein the set of splinesdeforms the brake spider when the anchor pin is inserted into themounting hole.
 2. The brake assembly of claim 1 wherein the splines havea greater hardness than the brake spider.
 3. The brake assembly of claim1 wherein each spline has a peak that is radially disposed furthest fromthe axis and a trough that is radially disposed closest to the axis,wherein the peak deforms the brake spider to form a groove in the brakespider when the anchor pin is inserted into the mounting hole.
 4. Thebrake assembly of claim 3 wherein the trough is located where twoadjacent splines meet and a gap is provided between the brake spider andthe trough when the anchor pin is received in the mounting hole.
 5. Abrake assembly comprising: a brake spider having a mounting hole; asleeve that is received in the mounting hole, the sleeve having a sleevehole; and an anchor pin that is disposed in the sleeve hole, wherein theanchor pin extends along an axis and has a set of splines that engagethe sleeve in the sleeve hole and extend substantially parallel to theaxis, wherein the set of splines deforms the sleeve when the anchor pinis inserted into the sleeve hole.
 6. The brake assembly of claim 5wherein the sleeve extends around the anchor pin such that the anchorpin does not engage the brake spider and the anchor pin has a greaterhardness than the sleeve.
 7. The brake assembly of claim 5 wherein eachspline has a peak that is radially disposed furthest from the axis and atrough that is radially disposed closest to the axis, wherein the peakdeforms the sleeve to form a groove in the sleeve when the anchor pin isinserted into the sleeve hole.
 8. The brake assembly of claim 7 whereinthe trough is located where two adjacent splines meet and a gap isprovided between the sleeve and the trough when the anchor pin isreceived in the sleeve hole.
 9. A brake assembly comprising: a brakespider having a mounting hole; a sleeve that is received in the mountinghole and has a sleeve hole that extends along an axis, wherein thesleeve has a set of engagement features that are disposed in the sleevehole and extend toward the axis; and an anchor pin that is received inthe sleeve hole and is engaged by the set of engagement features. 10.The brake assembly of claim 9 wherein the sleeve has a flange thatextends away from the axis and is disposed at a first end of the sleeveand a body that extends from the flange to a second end of the sleevethat is disposed opposite the first end.
 11. The brake assembly of claim10 wherein the body engages the brake spider in the mounting hole andthe flange engages a side surface of the brake spider to inhibit axialmovement of the sleeve.
 12. The brake assembly of claim 10 wherein eachmember of the set of engagement features is a spline that extendssubstantially parallel to the axis from the first end to the second end.13. The brake assembly of claim 12 wherein the splines are arrangedaround the axis in a repeating serpentine arrangement.
 14. The brakeassembly of claim 10 wherein the engagement features are arranged alongengagement feature axes that are arranged around the axis and aredisposed substantially parallel to the axis, wherein the engagementfeatures are arranged in a repeating serpentine arrangement along eachengagement feature axis.
 15. The brake assembly of claim 14 whereinmultiple engagement features are arranged along each engagement featureaxis between the flange and the second end.
 16. The brake assembly ofclaim 15 wherein the sleeve has a substantially constant outsidediameter where the engagement features are not provided.
 17. The brakeassembly of claim 10 wherein each member of the set of engagementfeatures is an arm that is cantilevered from the body.
 18. The brakeassembly of claim 17 wherein each arm is disposed in a corresponding armopening that extends through the body such that the arm extends from thebody into the arm opening and does not engage the body in the armopening.
 19. The brake assembly of claim 18 wherein the arm extends fromthe body to a distal end, wherein the arm is curved toward the axisbetween the body and the distal end.
 20. The brake assembly of claim 19wherein the arm extends from the body toward the flange such that thedistal end of the arm is disposed closest to the flange.